Genetic divergence studies on morphological and biochemical traits in tomato (Solanum lycopersicum L.)

Simple item page
dc.contributor.advisorSingh, Dhirendra
dc.contributor.authorSubhashree, Subhasmita
dc.date.accessioned2022-10-05T10:14:17Z
dc.date.available2022-10-05T10:14:17Z
dc.date.issued2022-07
dc.description.abstractTomato (Solanum lycopersicum L.) is an autogamous diploid (2n = 2X = 24) vegetable belonging to nightshade family (Solanaceae). Tomato is believed to be originated from the mountainous regions of Andes in Peru, Ecuador and Bolivia regions of South America. The present investigation entitled “GENETIC DIVERGENCE STUDIES ON MORPHOLOGICAL AND BIOCHEMICAL TRAITS IN TOMATO (Solanum lycopersicum L.),” was carried out at the Vegetable Research Centre, G.B.P.U.A.&T., Pantnagar. The experiment was comprised of 34 genotypes, i.e., JTL-1908, BT-2-5-21, ATL 18-08, Kashi Aman, Punjab Ratta, RHTHY-01, VNR-17019, ARTH-3689, RCDTH-21, Improved Bhagya, VNR-17017, VNR- 13008, RCDTH-11, RCDTH -2, RCDTH-15, VNR-15067, Julie, VRTH-16-112, CRPVRTH-70, Arka Rakshak, 2019/ TODVAR-1, 2019/ TODVAR-2, 2019/ TODVAR-4, 2019/ TODVAR-5, 2019/ TODVAR-6, 2019/ TODVAR- 10, Kashi ToLCV Hybrid-2, Kashi ToLCV Hybrid-3, PUSA ToLCV Hyb-10, Arka Aditya along with four checks, i.e., Pant T3, Kashi Chayan, Punjab Chhuhara and Kashi Tomato Hybrid-2 were sown in Augmented-II design with five blocks during Rabi season, 2021 to study sixteen morphological and biochemical parameters, namely, days to first flowering, days to 50%flowering, days to first fruit set, days to first picking, plant height (cm), number of fruits per plant, average fruit weight (g), yield per plant (kg), number of locules, pericarp thickness, TSS ( 0 Brix), acidity, ascorbic acid (mg/ 100 g fruit weight), total carotenoids (mg/ 100 g fruit weight), lycopene content (mg/ 100 g fruit weight) and total phenol (mg/ 100 g fruit weight) content . Molecular characterization was carried out by using lycopene specific SSR molecular marker to check polymorphism in genetic level among the thirty four genotypes.The pooled data were subjected to statistical analysis for analysis of variance (ANOVA), estimation of genetic variability, heritability h2(b), genetic advance, correlation studies, path coefficient analysis and genetic divergence analysis (D2 statistics). The traits, such as, number of fruits per plant, average fruit weight (g), yield/plant (kg), pericarp thickness (mm), ascorbic acid content (mg/ 100 g fruit weight), lycopene content (mg/ 100 g fruit weight), and total phenol content (mg/ 100 g fruit weight), high phenotypic coefficient of variability (PCV) and genotypic coefficient of variability (GCV) along with higher heritability was reported. Average fruit weight and number of fruits /plant is found to be positively correlated with yield per plant and also has a high direct positive effect on yield. Yield per plant contributes the maximum percentage towards the genetic divergence of the current study. Polymorphic information content (PIC) value of all the primers was laid between 0.469 to 0.614, symbolizes medium range of polymorphism between the genotypes. The genotypes grouped under major cluster A and cluster B are more diverse in nature with having 60% of similarity which symbolizes maximum divergence clusters. Based on the results of the study, it was revealed that the genotypes varied widely, indicating that there was opportunity for selection-based improvement of the tomato genotypes. The yield will be significantly increased by selection based on characteristics such as, number of fruits per plant and average fruit weight. The genotypes 2019/TODVAR 5, CRPVRTH-70, Pant T3 (C), 2019TODVAR 4, and Arka Rakshak were highlighted as promising ones for the yield related attributes based on the mean performance of the genotypes studied for different traits. The processing traits of Arka Aditya, Punjab Chhuhara, and VNR- 17019 were confirmed to be superior.en_US
dc.identifier.urihttps://krishikosh.egranth.ac.in/handle/1/5810188594
dc.keywordsGenetic studies, tomatoen_US
dc.language.isoEnglishen_US
dc.pages192en_US
dc.publisherG.B. Pant University of Agriculture and Technology, Pantnagar, District Udham Singh Nagar, Uttarakhand. PIN - 263145en_US
dc.research.problemTomatoen_US
dc.subVegetable Scienceen_US
dc.themeGenetic studiesen_US
dc.these.typeM.Scen_US
dc.titleGenetic divergence studies on morphological and biochemical traits in tomato (Solanum lycopersicum L.)en_US
dc.typeThesisen_US
Files
Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
SubhashreeSubhasmita.pdf
Size:
10.13 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Theses